LASER FLUORESCENCE DETECTION OF ATMOSPHERIC HYDROXYL RADICALS

The following sections are included:

• OH in the Atmosphere

• Techniques for Local Measurement of Hydroxyl Radicals

  • Local Tropospheric OH LIF Methods

    • Early Development of LIF Detection

    • The FAGE Method

    • Two-Photon LIF

  • Local Stratospheric OH LIF Methods

  • HO₂ Measurements via OH LIF

  • Current OH Measurement Capabilities

    • Laser-Induced Fluorescence

    • Long-Path Laser Absorption

    • Chemical Conversion Methods

• Field Measurements of Atmospheric Hydroxyl Radicals

  • Boundary Layer OH Determinations

  • Stratospheric OH Determinations

  • Design Strategies for OH Measurements

    • Measurement of Ancillary Variables

    • Spatial and Temporal Averaging Considerations

    • Accuracy in OH Predictions

    • Siting Considerations for Tropospheric Measurements

    • Absolute Concentration Calibration Methods

  • Intercomparison of OH Instrumentation

• A Laboratory Database for LIF Measurements

  • Experimental Configuration

  • Quenching of the A²Σ^* State

  • Vibrational Energy Transfer in the A²Σ⁺ State

  • Rotational Energy Transfer in the A²Σ⁺ State

  • Vibrational Energy Transfer in the X²Π_i State

  • Rotational Energy Transfer in the X²Π_i State

  • A Photochemical Model of LIF Detection of OH

• Acknowledgments

• References